Get next Octopus release version

file.ps1

$apiKey = "Your API Key"
$OctopusURL = "Your Octopus URL"
 
$Header =  @{ "X-Octopus-ApiKey" = $apiKey }
 
$ProjectName = "Your Project Name"
 
#Getting Environment and Project By Name
$Project = Invoke-WebRequest -Uri "$OctopusURL/api/projects/$ProjectName" -Headers $Header| ConvertFrom-Json

#Getting Deployment Template to get Next version 
$dt = Invoke-WebRequest -Uri "$OctopusURL/api/deploymentprocesses/deploymentprocess-$($project.Id)/template" -Headers $Header | ConvertFrom-Json 

#$dt.NextVersionIncrement contains the next version 
#that Octopus would normally auto-generate based on your
#project versioning strategy set on Projects -> [Project Name] -> Settings

$dt.NextVersionIncrement